Furnace



S. S. AMDURSKY.

FURNACE.

`APPLICATION FILED MAY14. 191s.

Patented Feb. 10, 1920.

4 SHEETS-SHEET l.

S. S. AMDURSKY.

FURNACE.

APPLICATION FILED MAY 14. 191s.

S. S. AIVIDURSKY.

FURNACE.

APPLICATION FILED MAY 14, 19m.

Patented Feb.510,1920.

' 4 sHEETs-sHEEr 3.

:Er- QJ;

man r f www S. S. AMDURSKY.

' FURNACE.

APPLICATION FILED MAYI4. 1918.

Patented Feb. 10, 1920.

4 SHEETS-SHEET 4 .IrsullllL lllllll u' me I@ e ....IIIIIIM HTToR/viy fprima srarns PATENT. ons

sAMUEL s. AMDUnsKYgoE ROCHESTER, New YORK( i,

FURNACE.. I

Specification of Letters Patent. l ytgntedleb; i0,

1/ Y0 all whom t may concern Y Belt known that I, SAMUEL-S. AMDURSKY, acitizen of the United Stateszof 1 America,

Monroe, inthe State of New York,` have :in-z

and residentvof Rochester7 in thev countybf vented new and usefulVImprovements in- Furnaces, of whichv the following, taken inw.

connection with' theV accompanying drawings, is a full,r clear, andeXactdescription. This invention relates to/,certain improve#v ments in.furnaces preferably of thel twin. type for receiving crucibles in whichthematcrial to be melted is placed. .The main .ob`ectlis to. increasethe genera working efficiency,` durability and output of this type offurnace and at the same timeA to reduce thelabor and cost of operation.

Oneof the specific objects is to distribute the heat uniformly Aaroundthe crucibles inboth chambers and to utilize a port-ionof.

the heat'from either chambers for heating the Crucible 1n the otherchamber so that when the metal in one crucibleis :ready to'V pour thatin they other Crucible .will bei. brought to the melting point andv willrequire but little direct heat to bring it. to the pouring point;

Another object is to. construct the furnace in sections in such mannerthat'they may be f readily assembled or. any impairedsectioir removedand replaced 'without destroying the remaining sections.

A further object `is to4 include in .thewalls of each combustion chamberburner section which may be removed or replaced as a. unit' and toprovide vthe fuel openingv of -each burner sectionwithfa rea separatemovable tubular vsleeve or lining so that tubes of diiferentsizesmaybeused `accord. ing to the volume of heat requiredwithout changing the.burner sections.kr l

A'still further objectisto provide-simple means for. preheating theV airlirrtransit tov .the .burner to better support 'the combustion ofthefueland to. .therebyincrease:its

heating efficiency. Y

YOther objects and uses relating to specific parts of the-apparatus.willbebrought outin the following description.l

In the drawings- 4Figure V-1- is. a topplan of fafurnace embodying` thevarious featuresof myn-l vention f Y Fig'.'-2f is a4 perspective view ofthe'inner shells vand their connections, the. cylinel drical segments ofoneshell, the rearV sections and oneI of the burner linings'being shownby dotted lines.l

Fig. 3u is a front elevation, partlyin section of the same-furnace. v v

Figs. 4- and m5;y areV sectional views taken respectivelyon lines 1li-4,Fig. -1,-, anda-5 5, Fig.

Rigs.v -(5-, -7` and-8-- are detail sectional views taken,respectivelykon lines4 Fig... -3-, and;8-8,

prises a pairof.similar'upright cylindricalV shells -4lof refractoryVmaterial kcapable of resist-imagv excessive deterioration vby heat ing.tangential ato the-inner lor adjacent sides of their respectgivecombustion `chambers yand y extend forwardly. therefrom', while; the.Voutlet Vsections'. arey tangential to andjeXte-ndH rearwardly from theirCorrespendingchamfv l v oers- -2+.

The: burner sections are provided f withv separate tubular linings Vlorsleeves-r -5- which are removable .to Vpermit vthemto;

be .replaced by similar liningsof'idiffereirt,

size .according to the volumeivor` degree-ofheatl requlredm thecombustion; cham-bers; I for-melting the same or-d1f`ferentmetals 1n-zthe .crucibles.,

The openings .through the., linings and burner sections -3- arenalinedandserve to'xdirect-.the burning fuels (as-gas) from separate gasburners -6- to their respective combustion chambers -2,-- as shown moreclearly in Fig. 5-, said burners being connected-to and supported bybranch supply pipes -7- and are provided with radiating annular ns '-.8-for cooling purposes.'

The outlets in the inner ends of the sec- Y tionsr-rare preferablytapered vand are Vwithin and follows the tortuous passage -13- to causethe heating of the air therein, one end of said pipe being connected toa suitable motor driven blower n-17-, the other end bein@ connected tothe. branch burner pipes F- to supply heated air to the burners to whichfuel gas is supplied by anpipe 18- also connected to they branch pipes7- in such mannerthat the forcedv flow'of air'thereto bythe blower aidsma-Y terially in feeding the desired quantity of fuel gas. Y Y

The branch pipes 7- leading to the burners are provided .withi:'uel-controlling` .valves 19- which are connected to the outlet valvesin such manner that when the fucl'controlling valve of either combustionchamber is opened its corresponding outlet y valve -9 will be closed letvalve opened. l

The means shown for operating those valves comprises a liiik--20-connecting the'valves '19- with one arm' of a bellcrank lever -21--, theother arm of said and the other outlever being connected by a link -22--to a l .similarlever -23 which, in turn, is connected' by a link -24- tooperating `levers #-25- for the valves -`-9- so that if the ber isopened to any degree, the outlet valve -9 of the corresponding` chamberwill be closed to a similar degree and the outlet valve of theotlierchamber vwill be opened toan approximately'equal-degree Vso as to retardthe `escape ofthe heated products Ifrom the closed combustion chamberand around the ACrucible therein before passing out through the outlet,thereby creatinga high degree of heat in .the closed chamber and arelatively lower degree ofheat in the open chamberf Y This manner ofcontrolling .the fuel and heated products of combustion enables themetal in the crucible of the closed chamber to be more expeditiouslymelted while that in the other crucible is being less rapidly raised tothe melting point and when the metal in the first Crucible is ready topour the positions of the valves may be easily heater pipes or coil 1S-under pressure from the pump 17 forincreasing the Vcombustion andthereby accelerating the melting of the metal in the crucibles.

The walls of the pre-heating chamber, iii which the heater coils 1G- arelocated are also made of'heat-refracting material 28- wliich may bewholly or partially Ysurrounded by a suitable heat insulating body -29-,the whole being incased in a metal housing -80- to retain the heat inthe chamber or passages -13- as long as possible,` Vthe branch passages-lG-l and -10- being provided with suitable ycleanoutlopenings normallyclosed by removable plugs dl Fig. 6--. 'Y

Aside from the Lburner and outlet sections wand 4L- the cylindricalwalls 'ofthe crucible-receivingshells may be made up of segments. (Figs.5 and 7) to facilitate molding and assembling and to enable anyiinpaired segment to be kreplaced without destroying the other segments.

The upright sides of the shells -1- including their connecting. section-2-' and burner andv outlet sections '-8- and are surrounded or inclosedby a somewhatthicker shell -3Q-- of fire brick or equiva-` lent materialmade up of sections of suitable size and form for convenience inmolding, handling and assembling, and also to assist in retaining theheat in the coinbusf tion chambers,v the shells -32- being in` turnsurrounded by ank outer lining 33- of'heat-insulating material to reduceto a minimum outward radiationv of the heat from the combustion chambersand forms a continuation of the insulating material surrounding thepreheating chamber previously cased vin a metal shell Sil-'- to lhold itin place against disintegration.'v

These various .upright shells -1-, -32-, +33* and 34eare supported uponan underlying frame orplate ,-354- of casty metal or equivalent materialwhich in turn maybe' supported at .the desired height by laeeeyeeirSuitable lege #-36% endif-37T, Said pletef being'providediwitlizepennge,-138# there-f through registering with'l and. ot approxi` mately the`Same diameter as. ,that 0f thecombustion 'chambeifs.,

Movable in these openingsdrop-bottoin; supports lV-39e i which; are

meunted uponlleeparete vertically Swinging:

frames -40'-, the latter being pivoted l at at the rear of the.open-ings andare PlOvd-id at their forward endsfwith cross bars-l-e-fZe-Y Yfor. interlocking engagement necessary to remove the bottomsof their respective combustion chambers and crucibles supported-thereby.

These combustionchambers are provided with bottom sections -4-normally-rest: ing upon theirsupports 39-and fitting closely Within thelowerends ofthe shells 1. for receiving and supporting `segmentalfloorlifts .45- uponvvhich are mount# edcircular segmental floors and.cruciblesupportinglegs or feet-47+, all an rangedwithin the'loWer endsof their re spective shells -l-.

The floor lift -45f, as Well asi-the lparts 46? and ,-47-, Withineachshell are re-V movable to permit the floorlift to be replaced byothers of different thicknesses for and supporting the parts and 47crucible carried by the latter at different heights Within thecombustion chamber.

The drop plate -f3 9+ together With-the bottom Vand parts and .-46-- areprovided with vertically alined central openings to permit` thedischarge of any molten material Whichfmay overflowv from. the cruciblevinto .the l combustion chamber;- The upper surface, of. the floor plateis inclined `;.to,vvardthe central openingtherein to facilitate itheflow off-such molten metal tothe center.

This floor plate -L-ispreferably com.; posedof a series ot similarsegments for convenience in molding; andassemblinggdaud l their meetingfacesareerecessed c toreceive the .lowe r ends of the,cruciblesupportingfeet' vorlega- 4741 which in turn are ai" ranged in equally spacedrelationfaround said central vopenings and extend f someadisf.

tance abovethe upper face-of :theloor plate Wherev they areV recessedto,l receive and support the lower, end 1 of y the Crucible against,lateral l displacement Y therefrom,

The uppenends .ofzthe inner shells forming the `cgmribustion chambersA.extend a shortV distance .above the upper, faces of the shells 32?,.and y and are surrounded byly a top.l .plate of cast,

metal; een, equivalent Ine-teriebA @enferme-g;

mere elfsleeste tlleaplan ,eehe furnace Whole7 and preferably made insectionsfor eenvenenee in melding: hendlingfendlassembli-ng.l

af removable eever f plete; .-249,-

iLern'lally\y l inggnormallyclosed byaplug Y Suitable means ie providedterremo-ving and replacing eacli ,ofthe coversvlf in,` dependently ofthe lother and in; order zth at both lmay be operated froina;centralpoint, e

Lhave provided `the;150195plate, .f48.-. .With any: upwardlynprojecting.` post ;53- upon which y are guided! separate, veItQLllymOV-` able members having theirlowervends attached to radial `lugs ,.-flvon thefadjaf. cent 'sides of their respective covers c A95-f, the upperendofreachfof ,the` vertically. slid-i ing members beingy connected ybya.. pair ofchains .or cables `'-555 tofopp'osite sidesof.thelcorresponding,cover and isfalso connected by a link *56?130 a`socketed rockarm aff?? Whichin turn, is pivoted to a support ,+587 onthe .post Y -,5 3v tlrene-v by supporting or suspending each?v cover.*4.9- at, .three.pQinte- A suitable, handle 59 isproyided lwith adoweled .end 670,-. adapted to vb e insert-A ed inthe` socket oreitherofthe, rook arms 557- for operating each lidoncoveiyindependently.oithelotheilidor cover, l

InFigL 'the lever visL- in posi.-

`t ion,;for shifting the leftfhandlid vvhichas previously.. explained,is ysupported y at three poi-nts'fro'm they vertically movable member.

Bvehangng ftllefhandlete the ileele .lille-Inf ber 5T-f, thesecondlidmayg,be-S1nilarly. lifted yand rocked-about the 4anis "of said ipost.

This. inde'p`endentv-lifting and moving of,l the separate lids permits.,either Crucible it@ lle-Pulled Willlt funeovering. the y l cofmbufsf`tion chamber in supported@ tomovefthe lid to one side oilfits which ttheotherl cruci-bleqis i The main lid orcOverl .a 1 1 d.g the,

charging cover"V T514 varef provid-ed :with separable inner linings orlfeupingsy .49f--4 and. *51"* of highly refractory, yinea-tee,- rialsecured to their respectlvc,,uppersee Y tions,` preferably bydove-tailed connections as shown more clearly in Figs. and

Referringagain to the pre-heating chamber 12%, it will be noted that thetortuf ous passages -18 are formed by baffle plates -13' in spacedparallel relation one above the other and extending from opposite endsof'both andV of less length than the said chamber to allow the passageof the heated products around the free ends thereof.

Provision is made for supporting a pair of crucibles a directly underthe center opening and theV floor kof the combustion chamber and uponsuitable pedestals -47- for receiving the molten metal in case either ofthe crucibles a should break during the melting operation.

' right crucible receiving and heating chani-` A f rightcrucible-receiving chambers-and v4a conwholly above that of the conduit.

Thev sections of the shell -lincluding the tangentialvconnectingconduits, burner sections -3-- and the outlet sections --/l-,together with the sections of the inclosing shell or housing areassembled to form gastight joints but itis evident that those partstogether with other structural elements Yof the furnace may be otherwiseconstructed Vto accomplish the same result, without departingv from Ythespirit of this invention.

What I claim is:

1.V In a twin furnace of the'character de# scribed, the combination of apair of upbers having a connecting conduit tangential to both chambersto allow the heated products to pass from either, chamber to the other'chamber, and separate burners Vfor said chambers.

.2. In .a twin furnace of the 'character de? scribed, the combination ofapair'of similar upright heating chambers having a connecting conduittangential toy both and mainly below the upper halves thereof forconducting heat from the interior of either chamber to the other andsepa-rate burners for said chambers. V

3. lIn a twin furnace of the character'described, the combinationl of apair of upright'crucible-receiving chambers and a con- 4duit connectingsaid chambers tangential to both,ysaid chambers having separate burnenreceiving sections provided with fuel inlets tangential to theirrespective chambers andl at substantially right c ngles to said conduit.

4. In a twin furnace of the characterdescribed, the 'combinationfof aypair of upduit connecting` said chambers tangential to hothand havingseparate burner-receiving sections provided with Vfuel inletstangentialto their respective chambers in a plane.y

V5. In a furnace of the character described, the combination of a pairof upright heating chambers having tangential fuel inlets and suitableoutlets Vfor Vthe heated products Vof combustion, and-valves for theinlets and; outlets and means for simultaneously operating the inletvalve of vone chamber and the outletvalvefof thev connecting passagevtangential thereto, saidV chambers having -fuel inlets opening into oneside and outlets opening from another side of the furnace, andvalves'for said outlets.

9. A furnacey of the character described having afcylindrical cruciblereceiving cha-mber provided withl a fuel inlet and an ou-tletl for theheated products, valves for said inlet and outlet, and operating,connection between said valves for simultaneously open? ing either valveand closing or vice-versa.

10. A twin furnacefhaving a pair of upi'ight cruciblereceiving chambersand a the other valve having tangential fuel inlets -above said;passage.: l y

11. A twin furnace having a pair ofupright Crucible! receiving`lchambers connected at one .side by ya passage which is tan4 gential toboth Vchambers andhaving their opposite sides Vprovidedlwith outlets ina plane above that of the passage.

12. y A twin furnace comprising a pairl of upright ciuciblereceivingchambers having a connecting passage tangential to both chambers andfuel inlets in the same side tangential to said chambers Jin a planeabove that of the passage. 'Y

13. In a twin furnace of the character delsciibed.,"the combination ofapair of upright crucible receiving. chambers having a connectingpassage, each chamberV having a fuel inlet and an outlet, gas-burnersfor the inlets,rvalvcs controlling the passage of fuel `through theburners, a heating chamber` connected by lseparate passagesto the out- Vlets, valves controlling communication be! tween said outlets and'heating chambers,

and anair pipe in the heating chamberV Y having one end receiving airfrom an external source and its Vopposite endr connected tothe burners.i

14. A twin furnace having a pair Yof crucible receiving chambers, aconduit'conpassage connecting'thelowerends lof said chambers*tangentialthereto, said chambers iioY necting said chambers, a fuel inlet to eachchamber, valves controlling the flow of fuel; through said inlets andmeans for simultaneously actuating said valves reversely to -move one toopen position as it moves `the` 'valves controlling the fuel inlets andthe fuel outlets and mechanismlfor simultaneously operating the fuelinlet valves re lversely and at the same time simultaneously operatingthe outlet valves reversely, the fuel inlet valve for each chambermoving to closed position as the outletvvalve for said. chamber movestoopen position.

' 'In Witness whereof I haveV hereunto setv i'nyhanol this 3rd day. ofMay, 1918.

v SAMUEL S. AMDURSKY.-

Witnesses.:

VINCENT C. HODDICK, y ABRAHAM EDELSTEIN.

